Gear down green light not on resulting in go around and manual extension of the gear.

Attributes
ACN	101285
Time
Date	198901
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach landing : go around other
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 120 flight time total : 13700 flight time type : 4900
ASRS Report	101285
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Upon gear extension one green gear down light failed to illuminate, gear was recycled and same occurred again, a go around was executed. Crew completed required checklist procedures and returned for an uneventful landing; after gear was determined to be down and safe. ATC was helpful in that they kept us informed of traffic and did not require extensive maneuvering from us, allowing crew to complete procedures more expeditiously and land sooner. My compliments to dfw terminal controllers. Well done. Aircraft remained on runway until gear was pinned. Then taxied to gate. Crash rescue was requested and were standing by, but not needed. The system worked well.

Original NASA ASRS Text

Title: GEAR DOWN GREEN LIGHT NOT ON RESULTING IN GO AROUND AND MANUAL EXTENSION OF THE GEAR.

Narrative: UPON GEAR EXTENSION ONE GREEN GEAR DOWN LIGHT FAILED TO ILLUMINATE, GEAR WAS RECYCLED AND SAME OCCURRED AGAIN, A GO AROUND WAS EXECUTED. CREW COMPLETED REQUIRED CHKLIST PROCS AND RETURNED FOR AN UNEVENTFUL LNDG; AFTER GEAR WAS DETERMINED TO BE DOWN AND SAFE. ATC WAS HELPFUL IN THAT THEY KEPT US INFORMED OF TFC AND DID NOT REQUIRE EXTENSIVE MANEUVERING FROM US, ALLOWING CREW TO COMPLETE PROCS MORE EXPEDITIOUSLY AND LAND SOONER. MY COMPLIMENTS TO DFW TERMINAL CTLRS. WELL DONE. ACFT REMAINED ON RWY UNTIL GEAR WAS PINNED. THEN TAXIED TO GATE. CRASH RESCUE WAS REQUESTED AND WERE STANDING BY, BUT NOT NEEDED. THE SYS WORKED WELL.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.